Captain Trips is a fictional virus occurring in the Stephen King novel The Stand.

A form of superflu (influenza), it originates in an American biological weapons laboratory under the Mojave Desert in California,...
and is hinted to have been created by breeding a hybrid of influenza and an AIDS-like illness.
99.4% of the human population is vulnerable and the disease is universally and swiftly fatal to those that catch it.
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Captain Trips is given several other nicknames by survivors, including “the rales,” and “Tube Neck.” “Captain Trips” and “the superflu” are the dominant names. The official code name of the virus development project was “Project Blue.”